CN106151121A - A kind of full-automatic gas-liquid displacement variable cross-section syphonic water flow generating means - Google Patents
A kind of full-automatic gas-liquid displacement variable cross-section syphonic water flow generating means Download PDFInfo
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- CN106151121A CN106151121A CN201510212181.9A CN201510212181A CN106151121A CN 106151121 A CN106151121 A CN 106151121A CN 201510212181 A CN201510212181 A CN 201510212181A CN 106151121 A CN106151121 A CN 106151121A
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Abstract
Processing at water, supply water and in long-distance pipe water delivery engineering, the vortex of entrance is the main cause of the water transfer pipe network pressure loss, siphon-flow water-carriage technology has unrivaled advantage with tradition water-carriage system.This invention, by pipe water mouth fairing 1, the double siphon of big specification reducing (cross section) 2 and full-automatic gas-liquid exchange cylinder 3, has collectively constituted siphon jet generating means.To the occasion needing water pump pressurization to supply water, grid commutator and siphon jet generator is installed additional by water pump import and export pipeline, preferably solve the problem that pump intake exists vortex and pre-swirl affects pump capacity and efficiency, to increasing water supply flow, increase pressure of supply water and fed distance, improve the aspects such as pump efficiency, achieve significant effect.
Description
One, technical field
In water process, water supply, pipe network and water conservancy irrigation, long distance delivery engineering, in order to energy-saving and cost-reducing, it is generally desirable that pipeline fluid is under conditions of certain runner form, wall roughness and current state are certain, pipeline friction loss can be reduced, increase the purpose of flow.But the air-breathing vortex due to the water inlet water surface, the air entering in water is caused to increase, on the other hand, dissolve in the fullness degree that the air in water reduces in pipe, can not meet flowing and reduce flow, on the other hand, vortex makes current not be that straight line is advanced in pipe, but flow along hand of helix, virtually add stroke (longer than the physical length of pipeline) thus add linear loss.In addition to pipeline itself (such as inner surface etc.) is improved, reduce the gas dissolving in water, improve the flowing quality of water body in pipeline, be only minimizing drag losses, increase the principal element of flow.
Two, background technology
Dissolved gas 20L/m in void fraction about 2%, i.e. water in natural water body3, can separate out with microbubble form when pressure drops to a certain value.Whirlpool is all produced at flow inlet.Whirlpool is ubiquitous, is a kind of extremely complex fluid forms of motion, the harm of water inlet whirlpool: 1, increases resistance to water-flow, reduces discharge area, reduce inflow, reduces discharge coefficient, when there is air-breathing whirlpool, conveyance capacity can be made to reduce 80%.2, aggravation flow fluctuation produces strong fluctuation pressure, causes unit or works vibration.3, reducing unit efficiency, strong air-breathing whirlpool can reduce the efficiency of unit 80%.4, volume inhales floating thing blocking or damage equipment etc..
Data shows, above water inlet, the water surface is all it may happen that vortex, a kind of is the water surface vortex of the quasi-stability with large scale, a kind of is that the water surface vortex that occurs at random of little yardstick is from the point of view of engineering values, the vortex that water inlet is formed is generally divided into Free Surface whirlpool, under water whirlpool and three kinds of spiral pipeline whirlpool, wherein Free Surface whirlpool is maximum to Effects on Engineering, and the various problems caused in order to avoid whirlpool sometimes have to carry out under relatively low discharge.Law is cut down according to Biot one sand, the closer to whirlpool center, its speed is the highest, static pressure is the lowest, thus the air penetrated into is the most the more, not only reduces the fullness degree of pipeline, and screw adds stroke and friction loss, there is turbulent flow aggravation in whirlpool, main flow and whirlpool district constantly have mass-energy to exchange, and between particle, frictional impact consumes a large amount of mechanical energy.
Viscosity is to produce the basic factor of whirlpool, and the flow field with current gradient makes viscosity play effect thus forms vortex movement.The formation of whirlpool is relevant with inlet velocity size and depth of immersion.Improve the body structure of water inlet, reduce water inlet flow velocity and reduce as far as possible, destroy unfavorable flow-shape and can effectively prevent the generation of air-breathing whirlpool, diplopore water inlet from intaking significantly better than single hole, being that whirlpool easily sends out region in the range of 30 ° above water inlet.
Pump intake exists prewhirls, and has eddy current in suction tube equally.Before pump, the mixing eddy current having rotation in suction tube, derives from the rotation of impeller of pump, and it is passed to suction tube in pump by liquid viscosity.Its intensity weakens with the increase from pump intake distance, and vortex, in the range of 7 times from pump intake calibers, directly influences pump lift and flow.The whirlpool of pump discharge enters downstream line normal pipe flow district, and the whirlpool of water inlet can cause stronger pulsating motion simultaneously, and it is unfavorable that the duty of feed pump is brought, and increases vibration and noise.For gas in normal pipe flow and the mixed flow of helical swirl, it is to affect flow and increase the principal element of the pressure loss.
Three, summary of the invention
(1), water inlet tube bank rectifier
According to Hydrodynamics Theory: viscous restriction is little, turbulent drag is big, and the change criterion of fluid flow state is Reynolds number, according to Reynolds number computing formula Re=VD/ γ (V: average speed, m/s；D: round tube inside diameter m；γ: viscosity.) Reynolds number is the most proportional with flow velocity caliber, Re is laminar flow less than 2320, is transition region, is turbulent flow more than 13000 between 2320～13000.Therefore, for the water inlet tube bank rectifier made by the suitable flow velocity of selection and caliber under set flow status, expand water inlet area, reduce flow velocity to reducing vortex, combing fluidised form, weaken the swing of helix, reduce overall resistance coefficient, the state that in the generation of water inlet vortex and pipe, liquid flowing is chaotic will be obviously improved.
1, commutator total length L is more than turbulent flow initial length i.e. L=1.25～5.0D, and wherein water inlet hyperbola mouth rectification mouth segment length L1 is 3/8L, tube bank rectifier length L2=1/2L.Outlet hyperbola reducer pipe segment length L3=1/8L.
2, tube bank rectifier
1), round tube inside diameter d is the 1/4～1/6 of suction hose diameter D；
2), pipe length L2 is the 1/2L of commutator length；
3), pipe quantity n=D2/d2*1.25。
3, water inlet rectification (stable section)
1) hyperbolic function x y=1/8DT, is met2Curve, throat diameter DT=1.2n1/2 d or DT ≈ 6～8d
2), reducer union length L3 ≈ 1/8L.
(2), variable cross-section siphon
Must possess according to siphon generation feature: 1, in pipe, persistently produce negative pressure；2, stable closing pillar is formed in pipe；3, flow velocity strengthens.For the characteristic phenomenon of this three aspects syphonic water flow, negative pressure condition in siphon is remarkably improved the fullness degree of liquid in pipe, meet the needs increasing carrying capacity of pipe, the good flow-shape of syphonic water flow and condition, lay a good foundation for improving pipe network conveyance capacity.
1), siphon caliber: Do=(0.8～0.92) Q1/2Q: water supply flow m3/h；
2), wall thickness: S >=D/130+ (1～2)；3), length Lo: general control is in 2～10m.
4) easily there is siphon according to reducing (cross section) double siphon, and siphon is the most abundant, the feature of persistent period length, determines that reducing (cross section) double design of siphon pipes parameter, water inlet pipe inclination alpha=47 ° bent tube section radius R=1.0～2.5Do reducing compare D/Do=1.2
(5) syphon mouth and outlet discrepancy in elevation h=200～400mm.
(3), Intelligent automatic gas-liquid swap tank
For guaranteeing that reducing diameter siphon tube is in operation the existence of continuous negative pressure, it is to avoid because of pipe fitting connect run emit, water clock etc. destroys the properly functioning of syphonic water flow, fully-automatic siphon exhaust apparatus is installed in the highest portion position of reducing diameter siphon tube, passes through automatic control panel.Guarantee that gas-liquid exchanges more than 1/2 of the water level diameter of cylinder in cylinder, DC during startup1 、DC2Open, DC3Normally closed, after managing interior water body and being full of, enter operation conditions.Electrodynamic valve DC under operation conditions3Normally opened, DC1 、DC2Normally closed.And intellectuality circulation repeats said process.Ensure that penetrating into the gas in siphon can enter gas-liquid commuting case top smoothly, improves the fullness degree of pipeline, simultaneously under condition of negative pressure, make the gas evolution being dissolved in the water form microbubble and enter gas-liquid swap tank.Ensureing to enter the current in pipe network on source, reduce the impact of " vapour lock " as far as possible, reduce the pressure loss, the rich head improving end water spot increases output.
Design parameter: 1) gas-liquid exchange cylinder volume V=(2～5 times) 1/4 π Do2·Lo；2) Intelligent automatic control panel
(4), pump import and export pipeline grid commutator be to prevent water pump vane from rotating to the impact of pre-swirl caused, import and export at water pump and be respectively provided with pipeline grid commutator length L=250～450mm；D1=1.25～5.0D；L2=1.5D；L1=1/3L2；Grid number 6～32, or 1/3D.
By this siphon jet generating means, water inlet source weakens the impact of whirlpool.Improve flowing quality so that it is flow more uniform.Pipeline water body fullness degree can be made to reach more than 99%.Conveyance capacity increases by more than 20%, and the pressure loss reduces by more than 15%.Existing pipe network is transformed and the design application of newly-built pipe network by siphon jet water body conveying technology, and energy-saving and cost-reducing, maintenance maintenance aspect all has unrivaled advantage with conventional water-carriage system, is a kind of green environmental protection technique product meeting circular economy concept.
Four, Figure of description explanation
Fig. 1 is conduit entrance tube bank rectifier skiagraph (Fig. 1 a) and A-A profile (Fig. 1 b).
Fig. 2 is pipeline grid commutator sectional drawing (Fig. 2 a) and A-A profile (Fig. 2 b).
Fig. 3 is full-automatic gas liquid exchanger profile.
Fig. 4 syphonic water flow secondary water supply system diagram.
Fig. 5 is unpowered syphonic water flow dykes and dams water delivery device system diagram.
Before operation, by Intelligent automatic gas-liquid swap tank, it is full of water body in making reducing (cross section) double siphon, and is in running status.By pipe water mouth fairing 1, the double siphon of big specification reducing (cross section) 2 and full-automatic gas-liquid exchange cylinder 3, collectively constitute siphon jet generating means.
Five, detailed description of the invention
1, application:
1) gravity flow water supply facility, system be newly-built and transformation；
2) pressure current water facilities, system be newly-built and transformation；
3) water body overflow, flood control installation construction and transformation；
4) water body water intaking conveying and the agricultural irrigation etc. of high range request are met.
2, embodiment:
1) water inlet tube bank rectifier product batch machining, sale；
2) full-automatic gas liquid exchanger product batch machining, sale；
3) reducing diameter siphon tube product batch machining, sale；
4) latticed duct products batch machining, sale；
5) a complete set of siphon jet generating means is produced and sold；
6) intelligent siphon jet water supply installation is produced and sold.
Claims (7)
1. water inlet conduit tube bank rectifier design parameter: commutator total length L=1.25～5.0D；Water inlet hyperbolic horn mouth segment length is L1=3/8L；The a length of L3=1/8L of outlet hyperbola reducer；Tube bank pipe diameter d=1/4～1/6D；Tube bank pipe length L2=1/2L, restrains pipe quantity n=D/d * 1.25.
2. hyperbolic horn mouth design parameter: meet hyperbolic function x y=1/8DT curve；Throat diameter D1=1.2n d or D1 ≈ 6～8d.
3. full-automatic gas-liquid swap tank design parameter: gas-liquid swap tank volume V=(2～5) × 1/4 π Do L；Intelligent automatic control panel.
4. reducing (cross section) double siphon basic parameter: water inlet pipeline section inclined angle alpha=47 °；Circle radius of the radian R=1.0～2.5Do；Import pipeline section reducing compares D/Do=1.2；Syphon mouth and the outlet discrepancy in elevation are more than 200～400mm；Siphon caliber: Do=(0.8～0.92) Q Q: water supply flow m/h；Wall thickness: S >=D/130+ (1～2)；Length Lo: general control is in 2～10m.
5. pipeline grid rectifier design parameter: length L=250～450mm；D1=1.25～5.0D；L2=1.5D；L1=1/3L2；Grid number 6～32, or 1/3D.
6. reducer uses the runner form meeting hyperbolic function.
7. by pipe water mouth fairing 1, the double siphon of big specification reducing (cross section) 2 and full-automatic gas-liquid exchange cylinder 3, collectively constitute siphon jet generating means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510212181.9A CN106151121A (en) | 2015-04-28 | 2015-04-28 | A kind of full-automatic gas-liquid displacement variable cross-section syphonic water flow generating means |
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| CN201510212181.9A CN106151121A (en) | 2015-04-28 | 2015-04-28 | A kind of full-automatic gas-liquid displacement variable cross-section syphonic water flow generating means |
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| CN106151121A true CN106151121A (en) | 2016-11-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106320427A (en) * | 2016-10-20 | 2017-01-11 | 王海燕 | Full-automatic gas-liquid displacement variable-cross-section siphon water flow generation device |
| CN110106963A (en) * | 2019-04-17 | 2019-08-09 | 厦门市宜景环境工程有限公司 | A kind of unpowered automatic siphon supply and drain water system |
| CN113981919A (en) * | 2021-12-01 | 2022-01-28 | 福建安澜水利水电勘察设计院有限公司 | Siphon type water inlet for ecological downward discharge of dam |
-
2015
- 2015-04-28 CN CN201510212181.9A patent/CN106151121A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106320427A (en) * | 2016-10-20 | 2017-01-11 | 王海燕 | Full-automatic gas-liquid displacement variable-cross-section siphon water flow generation device |
| CN110106963A (en) * | 2019-04-17 | 2019-08-09 | 厦门市宜景环境工程有限公司 | A kind of unpowered automatic siphon supply and drain water system |
| CN113981919A (en) * | 2021-12-01 | 2022-01-28 | 福建安澜水利水电勘察设计院有限公司 | Siphon type water inlet for ecological downward discharge of dam |
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Application publication date: 20161123 |